It is a icon of a pencil sharpener. It is a rectangle with a small circle on the outside where the pencil would be inserted. On the inside there is a blade it a dot in the middle.

This is the Pencil Sharpener icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.

Idea of Pencil Sharpener Icon by Anonymous

We've received the idea on July 24, 2013 and created the icons on November 25, 2013